Senior Frontend Developer

🔹 Opportunity – Senior Front End Software Developer (AI & RAG) 🔹

📌 About the role

We are looking for a Senior Front End Software Developer to join a cutting-edge team focused on scaling AI assets and building innovative AI-driven products. You will work at the intersection of LLMs, agentic architectures, RAG systems, and modern application development, contributing to the next generation of intelligent interfaces and document-understanding solutions.

In this role, you will collaborate with cross-functional teams, shape new AI-powered applications, and help bring state-of-the-art machine intelligence into real-world products used across the organization.

This position can be fully remote from anywhere in Spain, with monthly workshops in Madrid or Barcelona.

💻 What will you do?

🔹 Build intuitive, responsive, and modern interfaces using React.

🔹 Collaborate with backend, AI, and product teams to deliver end-to-end AI-powered applications.

🔹 Work hands-on with LLMs, RAG architectures, LangChain, and emerging AI technologies.

🔹 Contribute to the design of scalable and maintainable frontend solutions.

🔹 Integrate AI agents, embeddings, vector databases, and retrieval architectures into real applications.

🔹 Participate in Agile ceremonies and work closely with stakeholders to present, explain, and iterate on solutions.

🔹 Support experimentation, prototyping, and optimization of AI models and workflows.

💡 Mandatory Requirements

🔹 Strong experience with React.js (Senior level).

🔹 Solid background in full stack development (React + Node.js).

🔹 Hands-on experience with Large Language Models (LLMs) and Retrieval-Augmented Generation (RAG).

🔹 Knowledge of Python (for AI integrations).

🔹 Experience with Docker and modern cloud environments (AWS and/or Azure).

🔹 Ability to design scalable, reliable, maintainable software architectures.

🔹 Strong communication skills, autonomy, and problem-solving mindset.

🔹 English: mandatory.

✨ Nice to have

🔹 Practical experience with LangChain (highly preferred).

🔹 Familiarity with AI model deployment, inference optimization, and agentic workflows.

🔹 Experience integrating vector databases or embeddings-based search.

🔹 Previous work in Agile or cross-functional product teams.

🌍 Why join this project?

🤝 People first – diverse and inclusive culture in an international environment.

🚀 Cutting-edge technologies and global projects.

📈 Career growth and continuous development opportunities.

😁 Happiness and low turnover rate.

🎓 €1200 per year training budget and learning resources.

💰 Flexible compensation.

🩺 Private health insurance and benefits package.

⚡ Flexible working hours and hybrid model.

🏋️ Wellhub: access to fitness, wellness, and mental health support.

⚽ Football and paddle tennis teams sponsored by Capitole.

🥳 Team buildings, global events, and strong tech communities.

✨ Want to know more about us? Click here and discover all the details.

🔍 Find out what people are saying about us on Glassdoor Reviews.

👉 If you're passionate about AI, enjoy building seamless user experiences, and want to contribute to products powered by the latest advances in LLMs and agentic architectures — we would love to meet you.

Empowering People, Unlocking Innovation.

The employee will adhere to information security policies:

-Will have access to confidential information related to Capitole and the project they are working on.

-Must comply with the security policies and internal policies of the company and the client.

-Must sign an NDA.